Fixes for low-level alpaka based utilities

[fwyzard]

PR description:

Fix various low-level alpaka based utilities that were inadvertently mixing host and device code.

Required to build with alpaka in GPU-only mode.

PR validation:

Unit tests pass.

If this PR is a backport please specify the original PR and why you need to backport that PR. If this PR will be backported please specify to which release cycle the backport is meant for:

These changes should improve the correctness of the alpaka-based algorithms, and it would be a good idea to backport them to CMSSW 14.0.x for data taking.

[fwyzard]

type bugfix

[fwyzard]

enable gpu

[fwyzard]

please test

[cmsbuild]

cms-bot internal usage

[cmsbuild]

-code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-44640/39835

• This PR adds an extra 24KB to repository

Code check has found code style and quality issues which could be resolved by applying following patch(s)

• code-format:
  https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-44640/39835/code-format.patch
  e.g. curl -k https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-44640/39835/code-format.patch | patch -p1
  You can also run scram build code-format to apply code format directly

[fwyzard]

please test

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-44640/39836

• This PR adds an extra 20KB to repository

[cmsbuild]

A new Pull Request was created by @fwyzard for master.

It involves the following packages:

• HeterogeneousCore/AlpakaInterface (heterogeneous)

@fwyzard, @makortel can you please review it and eventually sign? Thanks.
@rovere, @missirol, @makortel this is something you requested to watch as well.
@sextonkennedy, @rappoccio, @antoniovilela you are the release manager for this.

cms-bot commands are listed here

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-74db24/38646/summary.html
COMMIT: c146ea1
CMSSW: CMSSW_14_1_X_2024-04-05-2300/el8_amd64_gcc12
Additional Tests: GPU
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmssw/44640/38646/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially removed 115 lines from the logs
• Reco comparison results: 48 differences found in the comparisons
• DQMHistoTests: Total files compared: 48
• DQMHistoTests: Total histograms compared: 3307717
• DQMHistoTests: Total failures: 3
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3307694
• DQMHistoTests: Total skipped: 20
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 47 files compared)
• Checked 202 log files, 165 edm output root files, 48 DQM output files
• TriggerResults: no differences found

GPU Comparison Summary

Summary:

• No significant changes to the logs found
• Reco comparison results: 34 differences found in the comparisons
• DQMHistoTests: Total files compared: 3
• DQMHistoTests: Total histograms compared: 39740
• DQMHistoTests: Total failures: 1683
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 38057
• DQMHistoTests: Total skipped: 0
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 2 files compared)
• Checked 8 log files, 10 edm output root files, 3 DQM output files
• TriggerResults: no differences found

[fwyzard]

+heterogeneous

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next master IBs (tests are also fine). This pull request will now be reviewed by the release team before it's merged. @sextonkennedy, @rappoccio, @antoniovilela (and backports should be raised in the release meeting by the corresponding L2)

[antoniovilela]

+1

[fwyzard]

@jsamudio FYI